Standardize task names

#### References:
* https://www.pivotaltracker.com/story/show/82607064
* https://www.pivotaltracker.com/story/show/79917492
* https://www.pivotaltracker.com/story/show/82487362

By converting the inconsistently named engines to the naming convention enforced by our task generator, we reduce the possibility of the type name being misinterpreted on the ember side, and make the code to infer the type simpler.